3JC2
The structure of the mammalian Sec61 channel opened by a signal sequence
ELECTRON MICROSCOPY
| Sample |
|---|
| Sec61 protein conducting channel opened by the pre-prolactin signal sequence |
| Sample Components |
| Sec61 alpha |
| Sec61 gamma |
| Sec61 beta |
| Pre-prolactin nascent chain |
| Specimen Preparation | |
|---|---|
| Sample Aggregation State | PARTICLE |
| Vitrification Instrument | FEI VITROBOT MARK I |
| Cryogen Name | ETHANE |
| Sample Vitrification Details | 3 uL sample was added to the grid, incubated for 30 seconds at 4 C, blotted for 9 seconds, and then plunged into liquid ethane (FEI VITROBOT). |
| 3D Reconstruction | |
|---|---|
| Reconstruction Method | SINGLE PARTICLE |
| Number of Particles | 101339 |
| Reported Resolution (Å) | 3.6 |
| Resolution Method | |
| Other Details | |
| Refinement Type | |
| Symmetry Type | POINT |
| Point Symmetry | C1 |
| Map-Model Fitting and Refinement | |||||
|---|---|---|---|---|---|
| Id | 1 (3J7Q, 1RH5) | ||||
| Refinement Space | REAL | ||||
| Refinement Protocol | |||||
| Refinement Target | R-factor | ||||
| Overall B Value | |||||
| Fitting Procedure | |||||
| Details | DETAILS--Real-space fitting using Chimera and Coot followed by reciprocal-space refinement using REFMAC | ||||
| Data Acquisition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Detector Type | FEI FALCON II (4k x 4k) | ||||||||
| Electron Dose (electrons/Å**2) | 27 | ||||||||
| Imaging Experiment | 1 |
|---|---|
| Date of Experiment | 2015-03-06 |
| Temperature (Kelvin) | |
| Microscope Model | FEI TITAN KRIOS |
| Minimum Defocus (nm) | 2000 |
| Maximum Defocus (nm) | 3500 |
| Minimum Tilt Angle (degrees) | |
| Maximum Tilt Angle (degrees) | |
| Nominal CS | |
| Imaging Mode | BRIGHT FIELD |
| Specimen Holder Model | |
| Nominal Magnification | 59000 |
| Calibrated Magnification | 104478 |
| Source | FIELD EMISSION GUN |
| Acceleration Voltage (kV) | 300 |
| Imaging Details |
| EM Software | ||
|---|---|---|
| Task | Software Package | Version |
| MODEL FITTING | Coot | |
| MODEL FITTING | REFMAC | |
| MODEL FITTING | UCSF Chimera | |
| RECONSTRUCTION | RELION | |
